Blowpipe.



PATENTED JAN. 16, 1906;

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Arm/mus W; M. BRADLEY.

BLOWPIPE.

APPLICATION FILED MAY22,1905.

WITNESSES: J I

No. 810,257. PATENTED JAN. 16, 1906.

W. M. BRADLEY.

BLOWPIPE.

APPLICATION FILED MAY 22. 1905,.

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WITNESSES: INVENTOR 7767661" Jffiradley ATTORNEYS nnrrnn sTAgns PArnNrorrron.

BLOWPIPE.

Specification of Letters Patent.

Patented Jan. 16, 1906.

Application filed May 22,1905. Serial No. 261.589.

To all whom, it may concern.-

Be it known that I, WALTER MINOR BRAD- LEY, a citizen of the UnitedStates, and a resident of New Haven, in the county of New Haven andState of Connecticut, have invented a new and Improved Blowpipe, ofwhich the following is a full, clear, and exact description.

My invention relates to blowpipes, and especially to those adapted formineralogical work and the like, in which it is desired to secure eitheran oxidizing or a reducing flame of a constant character. Its principalobjects are to provide means for adjustably supporting the blast-nozzlewith relation to the flame and for effectively supplying airpressurethereto.

Reference is to be had to the accompanying drawings, which form a partof this speciflcation, in which similar reference characters designatesimilar parts in all the views.

Figure 1 shows one embodiment of my invention in side elevation. Fig. 2is an enlarged side elevation, parts being broken away, of a portion ofthe carrier and blasttube supported thereon with parts in section. Fig.3 is a horizontal section on the line 3 3 of Fig. 2, and Fig. 4 is asection on the line 4 4 of Fig. 1.

1O designates a standard which in the present instance consists of thecombustiontube of a Bunsen burner, this tube being supported upon theordinary base 11 and having connected to it a supply-tube 12, throughwhich gas may be delivered. Surrounding the burner-tube is the usualperforated controlling-sleeve 13, and supported within said tube is aninner tube 14 for varying the character of the flame.

Engaging the standard is a carrier A for a portion of the blowpipe. Thiscarrier comprises a clamp furnished by a pair of pivoted members 16 16,which are curved at 17 to encircle the standard. One of these members isextended at 18 to surround and retain an arm 1.9, which is convenientlyof angular form, having a vertical portion extending substantiallyparallel to the standard, and an outwardly-extending portion 20, which,as illustrated, lies at an angle to the other member of the arm ofsomewhat more than ninety degrees. Movable upon the portion 20 of thearm is a clamp having pivoted members 21 21, which have angular ends 22,embracing the arm. Both this clamp and 'bers.

ing a reduced opening, while at the opposite extremity is a cap 25, theend wall of which furnishes a diaphragm having at its center a veryminute or contracted opening 25*. The cap is adapted to receive or havedrawn over it a flexible tube 26, preferably of rubber, which hascommunicating with its outer end a flexible storage-bulb 27, beyondwhich and connected with it through a tubular portion 27 a is a flexiblepressure-bulb 28, provided at its end opposite the tube 27 with a valve29, which resists the escape of air from the bulb when it is compressed.

The vertical adjustment of the carrier upon the standard by means of thelower clamp allows the positioning of the blast nozzle at any desiredheight with relation to the flame, while the movement of the upper clampover the arm places the nozzle closer to or farther from the flame, asmay be necessary to secure the proper results. The compression of thebulb 28 fills and expands the storage-bulb, and the air prevented fromescaping outwardly by the valve 29 passes through the opening in the capand is discharged by the blast-nozzzle into the flame, the very smallarea of the diaphragmopening securing both the necessary tenuity of theair-jet and providing for the retention of the supply within thestoragebulb for a considerable period. It will be seen that thecapability for double adjustment of the blast- 9 nozzle permits thesecuring of exactly the character of flame appropriate to any particularclass of work and maintains such flame constant and that the applicationof pressure to the blast-tube by the bulb system greatly lessens theinconvenience of blowpiping as compared with the customary method ofsupplying air from the lungs. If it is not desired to put the attachmentinto active use, the carrier may be lowered on the standard, thusremoving it from the vicinity of the flame, and even in its raisedposition it in no wise interferes with the removal or insertion of theinner tube of the burner.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. A blowpipeattachment comprising a pair of pivoted jaws, an arm fixed to one ofsaid jaws, a'second pair of pivoted jaws engaging the arm, and a tubecarried by one of these last-named jaws.

2. The combination with a burner-tube, of a pair of pivoted jaws forengaging the tube, an arm fixed to one of the said jaws, a second pairof pivoted jaws engaging the arm, a tube-section carried between thesecond pair of jaws, a flexible tube communicating with thetube-section, and a storage-' bulb and a pressure-bulb communicatingwith the flexible tube.

3. The combination with a burner-tube, of a pair of pivoted jaws forengaging the tube, an arm fixed to one of said jaws, a second pair ofpivoted jaws engaging the arm, a tube-section carried between the secondpair of jaws, and a storage-bulb and a pressure-bulb communicating withthe tube-section.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WALTER MINOR BRADLEY.

Witnesses:

ROGER S. WHITE, 2d, OLIVER S. WHITE.

